current bounds on the number of colors: 0 -- 47 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:47 2012 Optimize a model with 1427 rows, 1141 columns and 5221 nonzeros Presolve removed 3 rows and 69 columns Presolve time: 0.01s Presolved: 1424 rows, 1072 columns, 5152 nonzeros Variable types: 0 continuous, 1072 integer (1072 binary) Root relaxation: objective 0.000000e+00, 82 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (82 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:47 2012 Optimize a model with 707 rows, 577 columns and 2497 nonzeros Presolve removed 3 rows and 33 columns Presolve time: 0.00s Presolved: 704 rows, 544 columns, 2464 nonzeros Variable types: 0 continuous, 544 integer (544 binary) Root relaxation: objective 0.000000e+00, 84 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (129 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:47 2012 Optimize a model with 347 rows, 295 columns and 1135 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 344 rows, 280 columns, 1120 nonzeros Variable types: 0 continuous, 280 integer (280 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (120 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:47 2012 Optimize a model with 167 rows, 154 columns and 454 nonzeros Presolve removed 47 rows and 50 columns Presolve time: 0.00s Presolved: 120 rows, 104 columns, 360 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Root relaxation: objective 0.000000e+00, 47 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 44 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (173 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:47 2012 Optimize a model with 227 rows, 201 columns and 681 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 224 rows, 192 columns, 672 nonzeros Variable types: 0 continuous, 192 integer (192 binary) Root relaxation: objective 0.000000e+00, 97 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (147 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 3